Loading ...
Sorry, an error occurred while loading the content.

Re: SSN.dat File

Expand Messages
  • bill_w4zv
    George Lane: In short, use the smoothed International Sunspot Number (SSN) values in VOACAP -- or in any other interface program that uses VOACAP as their
    Message 1 of 2 , Apr 21 11:52 AM
    • 0 Attachment
      George Lane: "In short, use the smoothed International Sunspot Number
      (SSN) values in VOACAP -- or in any other interface program that uses
      VOACAP as their calculation engine. Smoothed SSNs can be found from
      the National Geophysical Data Center at:

      ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SUNSPOT_NUMBERS/sunspot.predict

      They maintain the (predicted) SSN figures based on the Lincoln-McNish
      smoothing function. These are the sunspot numbers used in the database
      reduction for the worldwide ionospheric maps used in IONCAP and now
      VOACAP."

      http://www.voacap.com/choosingssn.html

      These are the same SSN.dat numbers used in my previous post.

      73, Bill W4ZV
    Your message has been successfully submitted and would be delivered to recipients shortly.